Utreexo compresses the UTXO set into a compact accumulator. That means you don't need to store the entire UTXO set locally, just a root and some proofs. For someone trying to run a full Bitcoin node off modest hardware and poor connectivity, this is huge.

I've been testing lightweight setups for LN self-custody using LNbits + Phoenixd + Electrum servers. One major bottleneck is syncing and maintaining full nodes, especially when you don't have steady internet or storage.

With Utreexo, a fully validating node becomes realistic, even on old laptops or mobile rigs. Combine that with a mesh network or even some USB sneaker-netting and you could have resilient Bitcoin infra running off-grid.